Borrowed from:

http://sites.google.com/site/dpsresourcesite/Home/creative-commons-overview-and-resources

Creative Commons Overview and Resources

To explore new trends copyright licensing, view these presentations and resources:
Note: always check individual licensing notices before publishing on the Web or broadcasting!

Music and Sound
Code of Best Practice Around Fair Use
Copyright-Friendly and Copyleft Images and Sound (Mostly!)
for Use in Media Projects and Web Pages, Blogs, Wikis, etc.

Most of the media in these collections are attached to generous copyright licensing. Though you may not need to ask permission to use them when publishing on the Web for educational purposes, you should cite or attribute these images to their creators unless otherwise notified! If you see any copyright notices on these pages, read them for further instructions.
Note: always check individual licensing notices before publishing on the Web or broadcasting!

And for guidance in using copyrighted materials, consult the Code of Best Practices in Fair Use for Media Literacy Education and Copyright Advisory Network

Portals

Other portals (some subject-specific)



Also of interest:
Contributions via http://newtoolsworkshop.wikispaces.com which are licensed under a Creative Commons Attribution Share-Alike 3.0 License.